4.9t^2+5t-200=0

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Solution for 4.9t^2+5t-200=0 equation:


Simplifying
4.9t2 + 5t + -200 = 0

Reorder the terms:
-200 + 5t + 4.9t2 = 0

Solving
-200 + 5t + 4.9t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
4.9 the coefficient of the squared term: 

Divide each side by '4.9'.
-40.81632653 + 1.020408163t + t2 = 0

Move the constant term to the right:

Add '40.81632653' to each side of the equation.
-40.81632653 + 1.020408163t + 40.81632653 + t2 = 0 + 40.81632653

Reorder the terms:
-40.81632653 + 40.81632653 + 1.020408163t + t2 = 0 + 40.81632653

Combine like terms: -40.81632653 + 40.81632653 = 0.00000000
0.00000000 + 1.020408163t + t2 = 0 + 40.81632653
1.020408163t + t2 = 0 + 40.81632653

Combine like terms: 0 + 40.81632653 = 40.81632653
1.020408163t + t2 = 40.81632653

The t term is 1.020408163t.  Take half its coefficient (0.5102040815).
Square it (0.2603082048) and add it to both sides.

Add '0.2603082048' to each side of the equation.
1.020408163t + 0.2603082048 + t2 = 40.81632653 + 0.2603082048

Reorder the terms:
0.2603082048 + 1.020408163t + t2 = 40.81632653 + 0.2603082048

Combine like terms: 40.81632653 + 0.2603082048 = 41.0766347348
0.2603082048 + 1.020408163t + t2 = 41.0766347348

Factor a perfect square on the left side:
(t + 0.5102040815)(t + 0.5102040815) = 41.0766347348

Calculate the square root of the right side: 6.409105611

Break this problem into two subproblems by setting 
(t + 0.5102040815) equal to 6.409105611 and -6.409105611.

Subproblem 1

t + 0.5102040815 = 6.409105611 Simplifying t + 0.5102040815 = 6.409105611 Reorder the terms: 0.5102040815 + t = 6.409105611 Solving 0.5102040815 + t = 6.409105611 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5102040815' to each side of the equation. 0.5102040815 + -0.5102040815 + t = 6.409105611 + -0.5102040815 Combine like terms: 0.5102040815 + -0.5102040815 = 0.0000000000 0.0000000000 + t = 6.409105611 + -0.5102040815 t = 6.409105611 + -0.5102040815 Combine like terms: 6.409105611 + -0.5102040815 = 5.8989015295 t = 5.8989015295 Simplifying t = 5.8989015295

Subproblem 2

t + 0.5102040815 = -6.409105611 Simplifying t + 0.5102040815 = -6.409105611 Reorder the terms: 0.5102040815 + t = -6.409105611 Solving 0.5102040815 + t = -6.409105611 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5102040815' to each side of the equation. 0.5102040815 + -0.5102040815 + t = -6.409105611 + -0.5102040815 Combine like terms: 0.5102040815 + -0.5102040815 = 0.0000000000 0.0000000000 + t = -6.409105611 + -0.5102040815 t = -6.409105611 + -0.5102040815 Combine like terms: -6.409105611 + -0.5102040815 = -6.9193096925 t = -6.9193096925 Simplifying t = -6.9193096925

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.8989015295, -6.9193096925}

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